Valve.



No. 877,865. PATENT'ED JAN. 2s, 1908.

A. C'. RIGKSBCKBR, Jn.

VALVE.

APPLICATION FILED SEPT.29. 1906.

` c 6L Hw 74 I l 4L Z 6l6 UNITED STATES PATENT`o1rnronk ALVA C. RICKSECKER, JR., OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO AJAX VALVE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

VALVE.

Speccatioix of `Letters Patent.

Patented Jan. as, 190s.

Original application filed May 6 1905. Serial No. 259.149.' Divided and this application tiled September 29| 1906. Serial No. 336,706.

i 7 Chicago, in the county of Cook and State of inwardly an Illinois, have invented new and useful 'Improvements'in Valves, of which the follow ing' is a specification, reference being had to the accompanying drawings forming a part thereof.

This a 'lication is a division of my application o. 259,149,1iled May 6, 1905.

Thepur ose of the invention broadly set out in sai arent application is to provide an im roved) construction of valve in which the dlsk shall be adapted to accommodate itself to the seat byvirtue ofthe elasticity and flexibility of the disk, and which shall nevertheless be adapted to sustain and resist hi h pressure when seated. Said parent app i cation shows the spring disk in several forms, in some of which it is seated upon an outwardly sloping seat, and in others upon an inwardly sloping seat. f -f The specific invention selected to pe covered by the claims of the parent app ication is that in which the disk seats upon an out- `wardly sloping seat, and the specific invention to wh1ch this divisional ap lication re. lates is the form in which such d1s seats upon an inwardly sloping seat. It consists of the features of construction ofthe valve and seat as set out in the claims.

In the drawings :-Figure 1 is an axial section of avalve and its seat embodying one form ofthe specific. invention mentioned. Fig. 2 is a similar view showin a modification in the form of a valve dis Fig. 3 is section of a complete valve body having a valve disk and seatembodying this invention in its preferred form;

In the drawings the valve body, 1, fully shown in Figl. 3, has the valve seat, 2, sloped adapted to be encountered by the valve disk on such inward slope. The valve disk, 3, is preferably made of elastic sheet metal struck u or pressed in a die or s un into the desire form.y In all three of t e figures showing modifications of the disk it has its-seating ortion constituting a peri heral annulus, t e entire disk being in the orm'or` a cup or cap, that is, being dished or cupped,and having a central aperture in the bottom of the dish or cup form by" 'means of which aperture it is adapted to ass onto the holder or terminal element, 4, o the stem, said "holder having a-threaded lterminal portion, 4a, which passesthl'ough the central aperture of the dis and having also an annular platform or shoulder, 4b, surrounding duced a fluid-tight joint between the disk and the holder. A gasket, 6, or other means of preventing the passage of fluid, may be interposed between the binding nut, 5, and the annular portion of the disk against which said nut operates to clamp it to the corrugated seat or shoulder, 4b. The disk holder, 4, is preferably connected to the threaded stem, 7, so as to be readily detachable and to permit the stem to rotate without rotating the holder and disk. Themode of attachm'ent illustrated is familiar, the stem, 7

' havin an enlargement or flange, 7, at the end w ich engages under the slot, 4, at the end` of the holder, the slot being extended so as to open at one side for entering the head onto the stem.-

In Fig. 1, the disk, 3, is shown with itsl peripheral annulus cylindrical, so vthat when theedge of said cylindrical portion encoun-v ters the inwardly sloping seat said cylindrical annulus will readily spring by yieldmg in one direction and expanding in another, if necessary, to accommodate itself to the seat whenV the latter is not perfectly circular, or when theI angle at'which 1t encounters it -requires such springing in order to make perfect contact at a line which will in such case be sli htly oval.

In the form shown in Fig. 2 the `sk, 3, has its peripheral annulus dished or flaring conically, --that is, with direct or straight-line slope from the central portion where it is bent between the shoulder, 4b, and the nut, to the edge which encounters the inwardly sloping seat. In this'construction the inchnation of the conically sloping annulus ofthe disk and the slo e of the seat are preferably so related. that t e angle between the two at the inner Sider-that is, toward the axis of the valve,-is a little greater than a right angle, so that ressure forcing the valve to its seat will tend to sprin the valve out ol' circular form at the perip er il' necessary to cause it to reach the seat t roughout its entire cir! cumference, the action in this respect being 25 i slightly ,more convex outwardly by sucii similar toithat above described withres ect B ut this orrn 1s readily made to operatewith less tendency to the form shown` in Fig. 1.

to spring or to require more pressure to s ring out oi circular form than that shown in 'g. 1,

lby merely making the slope of the seat and vdisk relatively such as to cause the disk to enat right angles, so

counter the seat nearly ld wou seat it tends that the pressure whic 3- to produce a thrust nearly at right angles to the seat'. The form shown in Fig. 3 is--preferred Jfor i most purposes 4to the other forms, though In the said other forms have their special advantages and are specially fitted for certain uses. form shown in Fig. 3 theperipheral annulus of Ithe disk, 3, is radially concave toward the port r fluidway which it con-- trols,-`that is to say, convex toward the directionrrorn` whichpressure is applied to seat it. The advantage of this concavo-oonveX formfof the disk is that upon being forced to its seat'owith considerable pressure it oper-- 'ates as an arch with the elasticity afforded by the curved form, and is rendered .onl

pressure; whereasin the form, for example, shown in Fi sprig the va ve radially may spring 1t out- War y at one part and inwardly at another part of its circumferential extent, with the vresult 'that the seating edge is liable to ,be

i rendered somewhat serpentine, and so to be sprung in off thelseat atsome points. The form-shown in Fig. 3, on the'contrary, must .spring or bulge outward throu hout its entire circumference', and-cannot bu ge or be buc- '2 such pressure tending to kled inward' at an oint by the 'pressureby y PThe'angle at which the which it is seated. disk meets the seat; in the form shown in-Fig. 3 is 4preferably substantially the saineas 1n Fi .2, and for the same reasons. Iclaim zannular fexible outer portion forvseating, 1n combination with aholder to which `such disk is detachably secured and anlnwardly sloping seat postloned relatively to the valve for the encounter of its inwardslope bythe edge only of the disk.

, 2l In a valve, a thinimetal valve disk of dished or flaring form, in combination'with a holder and means for securing the disk to the holder about the central portion, and an inwardly slopingseat positioned for the encounter of lts inward slope by the outer circumference or edge only of the 'flaring portion of the disk. 4

3. In a valve, a thin metal disk of dished or flaring form concavo-convex in radial section; a holderfor such diskion which the 1. In' avalve, @this metal diskhavig an 1 same is mounted with the concave side toward the seat, in combination with, an inwardly sloping seat whose inward-Slo e is ada ted this 15th day of 

